Tonight, please complete the worksheet provided in class, regarding the length of essays on the SAT writing section. Questions (b) and (c) require you to use the graphing calculator...
If you need help with the calculator stuff (to find the regression equation, r, and r^2), you have a couple options...
**The coefficient of determination is R^2.
1. Check out page 151 in your textbook and use the yellow box at the bottom.
2. Use this link to create a scatter plot: http://calculator.maconstate.edu/scatterplot/index.html
3. Use this link to find the regression equation: http://calculator.maconstate.edu/linear_regression/index.html
**If your calculator does not give you r and R^2, you first need to set it to do so. Press 2nd, 0 to go to the catalog. Then, scroll down and select "DiagnosticOn." Press enter twice. This sets our calculator to show r and R^2; now, do the steps to find the regression equation again (from #3) and it'll show these values.
**If your calculator does not give you r and R^2, you first need to set it to do so. Press 2nd, 0 to go to the catalog. Then, scroll down and select "DiagnosticOn." Press enter twice. This sets our calculator to show r and R^2; now, do the steps to find the regression equation again (from #3) and it'll show these values.
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